The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2015
Filed:
Mar. 19, 2013
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Kushal Narayanaswamy, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); F02D 41/00 (2006.01); F02D 41/02 (2006.01);
U.S. Cl.
CPC ...
F01N 3/20 (2013.01); F02D 41/0082 (2013.01); F02D 41/0235 (2013.01); F01N 3/2073 (2013.01); F01N 3/208 (2013.01); F02D 41/0087 (2013.01); F01N 2610/00 (2013.01); F01N 2240/25 (2013.01);
Abstract
A powertrain includes an internal combustion engine with multiple cylinders and an aftertreatment system having a selective catalytic reduction device utilizing ammonia as a reductant. An ammonia generation cycle includes operating some portion of the cylinders at an air/fuel ratio conducive to producing molecular hydrogen and some portion of the cylinders at an air/fuel ratio conducive to producing NOx. An ammonia generation catalyst is utilized between the engine and the selective catalytic reduction device to produce ammonia.